mirror of https://gitee.com/openkylin/linux.git
lockd: Introduce new-style XDR functions for NLMv4
We'd like to prevent local buffer overflows caused by malicious or broken servers. New xdr_stream style decoders can do that. For efficiency, we also want to be able to pass xdr_streams from call_encode() to all XDR encoding functions, rather than building an xdr_stream in every XDR encoding function in the kernel. Same idea as the NLM v3 XDR overhaul. Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Tested-by: J. Bruce Fields <bfields@redhat.com> Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
This commit is contained in:
Chuck Lever
Trond Myklebust
parent
f604870939
commit
3460f29a27
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@ -6,5 +6,5 @@ obj-$(CONFIG_LOCKD) += lockd.o
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lockd-objs-y := clntlock.o clntproc.o clntxdr.o host.o svc.o svclock.o \
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svcshare.o svcproc.o svcsubs.o mon.o xdr.o grace.o
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lockd-objs-$(CONFIG_LOCKD_V4) += xdr4.o svc4proc.o
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lockd-objs-$(CONFIG_LOCKD_V4) += clnt4xdr.o xdr4.o svc4proc.o
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lockd-objs := $(lockd-objs-y)
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@ -0,0 +1,621 @@
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/*
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* linux/fs/lockd/clnt4xdr.c
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*
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* XDR functions to encode/decode NLM version 4 RPC arguments and results.
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*
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* NLM client-side only.
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*
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* Copyright (C) 2010, Oracle. All rights reserved.
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*/
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#include <linux/types.h>
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#include <linux/sunrpc/xdr.h>
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#include <linux/sunrpc/clnt.h>
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#include <linux/sunrpc/stats.h>
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#include <linux/lockd/lockd.h>
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#define NLMDBG_FACILITY NLMDBG_XDR
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#if (NLMCLNT_OHSIZE > XDR_MAX_NETOBJ)
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# error "NLM host name cannot be larger than XDR_MAX_NETOBJ!"
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#endif
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#if (NLMCLNT_OHSIZE > NLM_MAXSTRLEN)
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# error "NLM host name cannot be larger than NLM's maximum string length!"
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#endif
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/*
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* Declare the space requirements for NLM arguments and replies as
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* number of 32bit-words
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*/
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#define NLM4_void_sz (0)
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#define NLM4_cookie_sz (1+(NLM_MAXCOOKIELEN>>2))
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#define NLM4_caller_sz (1+(NLMCLNT_OHSIZE>>2))
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#define NLM4_owner_sz (1+(NLMCLNT_OHSIZE>>2))
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#define NLM4_fhandle_sz (1+(NFS3_FHSIZE>>2))
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#define NLM4_lock_sz (5+NLM4_caller_sz+NLM4_owner_sz+NLM4_fhandle_sz)
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#define NLM4_holder_sz (6+NLM4_owner_sz)
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#define NLM4_testargs_sz (NLM4_cookie_sz+1+NLM4_lock_sz)
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#define NLM4_lockargs_sz (NLM4_cookie_sz+4+NLM4_lock_sz)
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#define NLM4_cancargs_sz (NLM4_cookie_sz+2+NLM4_lock_sz)
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#define NLM4_unlockargs_sz (NLM4_cookie_sz+NLM4_lock_sz)
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#define NLM4_testres_sz (NLM4_cookie_sz+1+NLM4_holder_sz)
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#define NLM4_res_sz (NLM4_cookie_sz+1)
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#define NLM4_norep_sz (0)
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static s64 loff_t_to_s64(loff_t offset)
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{
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s64 res;
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if (offset >= NLM4_OFFSET_MAX)
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res = NLM4_OFFSET_MAX;
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else if (offset <= -NLM4_OFFSET_MAX)
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res = -NLM4_OFFSET_MAX;
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else
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res = offset;
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return res;
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}
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static void nlm4_compute_offsets(const struct nlm_lock *lock,
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u64 *l_offset, u64 *l_len)
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{
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const struct file_lock *fl = &lock->fl;
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BUG_ON(fl->fl_start > NLM4_OFFSET_MAX);
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BUG_ON(fl->fl_end > NLM4_OFFSET_MAX &&
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fl->fl_end != OFFSET_MAX);
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*l_offset = loff_t_to_s64(fl->fl_start);
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if (fl->fl_end == OFFSET_MAX)
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*l_len = 0;
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else
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*l_len = loff_t_to_s64(fl->fl_end - fl->fl_start + 1);
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}
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/*
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* Handle decode buffer overflows out-of-line.
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*/
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static void print_overflow_msg(const char *func, const struct xdr_stream *xdr)
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{
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dprintk("lockd: %s prematurely hit the end of our receive buffer. "
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"Remaining buffer length is %tu words.\n",
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func, xdr->end - xdr->p);
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}
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/*
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* Encode/decode NLMv4 basic data types
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*
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* Basic NLMv4 data types are defined in Appendix II, section 6.1.4
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* of RFC 1813: "NFS Version 3 Protocol Specification" and in Chapter
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* 10 of X/Open's "Protocols for Interworking: XNFS, Version 3W".
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*
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* Not all basic data types have their own encoding and decoding
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* functions. For run-time efficiency, some data types are encoded
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* or decoded inline.
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*/
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static void encode_bool(struct xdr_stream *xdr, const int value)
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{
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__be32 *p;
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p = xdr_reserve_space(xdr, 4);
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*p = value ? xdr_one : xdr_zero;
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}
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static void encode_int32(struct xdr_stream *xdr, const s32 value)
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{
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__be32 *p;
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p = xdr_reserve_space(xdr, 4);
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*p = cpu_to_be32(value);
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}
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/*
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* typedef opaque netobj<MAXNETOBJ_SZ>
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*/
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static void encode_netobj(struct xdr_stream *xdr,
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const u8 *data, const unsigned int length)
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{
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__be32 *p;
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BUG_ON(length > XDR_MAX_NETOBJ);
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p = xdr_reserve_space(xdr, 4 + length);
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xdr_encode_opaque(p, data, length);
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}
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static int decode_netobj(struct xdr_stream *xdr,
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struct xdr_netobj *obj)
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{
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u32 length;
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__be32 *p;
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p = xdr_inline_decode(xdr, 4);
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if (unlikely(p == NULL))
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goto out_overflow;
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length = be32_to_cpup(p++);
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if (unlikely(length > XDR_MAX_NETOBJ))
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goto out_size;
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obj->len = length;
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obj->data = (u8 *)p;
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return 0;
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out_size:
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dprintk("NFS: returned netobj was too long: %u\n", length);
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return -EIO;
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out_overflow:
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print_overflow_msg(__func__, xdr);
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return -EIO;
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}
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/*
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* netobj cookie;
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*/
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static void encode_cookie(struct xdr_stream *xdr,
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const struct nlm_cookie *cookie)
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{
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BUG_ON(cookie->len > NLM_MAXCOOKIELEN);
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encode_netobj(xdr, (u8 *)&cookie->data, cookie->len);
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}
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static int decode_cookie(struct xdr_stream *xdr,
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struct nlm_cookie *cookie)
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{
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u32 length;
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__be32 *p;
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p = xdr_inline_decode(xdr, 4);
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if (unlikely(p == NULL))
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goto out_overflow;
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length = be32_to_cpup(p++);
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/* apparently HPUX can return empty cookies */
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if (length == 0)
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goto out_hpux;
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if (length > NLM_MAXCOOKIELEN)
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goto out_size;
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p = xdr_inline_decode(xdr, length);
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if (unlikely(p == NULL))
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goto out_overflow;
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cookie->len = length;
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memcpy(cookie->data, p, length);
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return 0;
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out_hpux:
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cookie->len = 4;
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memset(cookie->data, 0, 4);
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return 0;
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out_size:
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dprintk("NFS: returned cookie was too long: %u\n", length);
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return -EIO;
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out_overflow:
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print_overflow_msg(__func__, xdr);
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return -EIO;
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}
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/*
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* netobj fh;
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*/
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static void encode_fh(struct xdr_stream *xdr, const struct nfs_fh *fh)
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{
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BUG_ON(fh->size > NFS3_FHSIZE);
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encode_netobj(xdr, (u8 *)&fh->data, fh->size);
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}
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/*
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* enum nlm4_stats {
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* NLM4_GRANTED = 0,
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* NLM4_DENIED = 1,
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* NLM4_DENIED_NOLOCKS = 2,
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* NLM4_BLOCKED = 3,
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* NLM4_DENIED_GRACE_PERIOD = 4,
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* NLM4_DEADLCK = 5,
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* NLM4_ROFS = 6,
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* NLM4_STALE_FH = 7,
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* NLM4_FBIG = 8,
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* NLM4_FAILED = 9
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* };
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*
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* struct nlm4_stat {
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* nlm4_stats stat;
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* };
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*
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* NB: we don't swap bytes for the NLM status values. The upper
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* layers deal directly with the status value in network byte
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* order.
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*/
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static void encode_nlm4_stat(struct xdr_stream *xdr,
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const __be32 stat)
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{
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__be32 *p;
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BUG_ON(be32_to_cpu(stat) > NLM_FAILED);
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p = xdr_reserve_space(xdr, 4);
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*p = stat;
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}
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static int decode_nlm4_stat(struct xdr_stream *xdr, __be32 *stat)
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{
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__be32 *p;
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p = xdr_inline_decode(xdr, 4);
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if (unlikely(p == NULL))
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goto out_overflow;
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if (unlikely(*p > nlm4_failed))
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goto out_bad_xdr;
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*stat = *p;
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return 0;
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out_bad_xdr:
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dprintk("%s: server returned invalid nlm4_stats value: %u\n",
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__func__, be32_to_cpup(p));
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return -EIO;
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out_overflow:
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print_overflow_msg(__func__, xdr);
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return -EIO;
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}
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/*
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* struct nlm4_holder {
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* bool exclusive;
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* int32 svid;
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* netobj oh;
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* uint64 l_offset;
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* uint64 l_len;
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* };
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*/
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static void encode_nlm4_holder(struct xdr_stream *xdr,
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const struct nlm_res *result)
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{
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const struct nlm_lock *lock = &result->lock;
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u64 l_offset, l_len;
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__be32 *p;
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encode_bool(xdr, lock->fl.fl_type == F_RDLCK);
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encode_int32(xdr, lock->svid);
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encode_netobj(xdr, lock->oh.data, lock->oh.len);
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p = xdr_reserve_space(xdr, 4 + 4);
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nlm4_compute_offsets(lock, &l_offset, &l_len);
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p = xdr_encode_hyper(p, l_offset);
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xdr_encode_hyper(p, l_len);
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}
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static int decode_nlm4_holder(struct xdr_stream *xdr, struct nlm_res *result)
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{
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struct nlm_lock *lock = &result->lock;
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struct file_lock *fl = &lock->fl;
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u64 l_offset, l_len;
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u32 exclusive;
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int error;
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__be32 *p;
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s32 end;
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memset(lock, 0, sizeof(*lock));
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locks_init_lock(fl);
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p = xdr_inline_decode(xdr, 4 + 4);
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if (unlikely(p == NULL))
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goto out_overflow;
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exclusive = be32_to_cpup(p++);
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lock->svid = be32_to_cpup(p);
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fl->fl_pid = (pid_t)lock->svid;
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error = decode_netobj(xdr, &lock->oh);
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if (unlikely(error))
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goto out;
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p = xdr_inline_decode(xdr, 8 + 8);
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if (unlikely(p == NULL))
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goto out_overflow;
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fl->fl_flags = FL_POSIX;
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fl->fl_type = exclusive != 0 ? F_WRLCK : F_RDLCK;
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p = xdr_decode_hyper(p, &l_offset);
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xdr_decode_hyper(p, &l_len);
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end = l_offset + l_len - 1;
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fl->fl_start = (loff_t)l_offset;
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if (l_len == 0 || end < 0)
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fl->fl_end = OFFSET_MAX;
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else
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fl->fl_end = (loff_t)end;
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error = 0;
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out:
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return error;
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out_overflow:
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print_overflow_msg(__func__, xdr);
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return -EIO;
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}
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/*
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* string caller_name<LM_MAXSTRLEN>;
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*/
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static void encode_caller_name(struct xdr_stream *xdr, const char *name)
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{
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/* NB: client-side does not set lock->len */
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u32 length = strlen(name);
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__be32 *p;
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BUG_ON(length > NLM_MAXSTRLEN);
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p = xdr_reserve_space(xdr, 4 + length);
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xdr_encode_opaque(p, name, length);
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}
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/*
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* struct nlm4_lock {
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* string caller_name<LM_MAXSTRLEN>;
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* netobj fh;
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* netobj oh;
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* int32 svid;
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* uint64 l_offset;
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* uint64 l_len;
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* };
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*/
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static void encode_nlm4_lock(struct xdr_stream *xdr,
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const struct nlm_lock *lock)
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{
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u64 l_offset, l_len;
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__be32 *p;
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encode_caller_name(xdr, lock->caller);
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encode_fh(xdr, &lock->fh);
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encode_netobj(xdr, lock->oh.data, lock->oh.len);
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p = xdr_reserve_space(xdr, 4 + 8 + 8);
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*p++ = cpu_to_be32(lock->svid);
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nlm4_compute_offsets(lock, &l_offset, &l_len);
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p = xdr_encode_hyper(p, l_offset);
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xdr_encode_hyper(p, l_len);
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}
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|
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|
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/*
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* NLMv4 XDR encode functions
|
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*
|
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* NLMv4 argument types are defined in Appendix II of RFC 1813:
|
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* "NFS Version 3 Protocol Specification" and Chapter 10 of X/Open's
|
||||
* "Protocols for Interworking: XNFS, Version 3W".
|
||||
*/
|
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|
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/*
|
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* struct nlm4_testargs {
|
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* netobj cookie;
|
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* bool exclusive;
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* struct nlm4_lock alock;
|
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* };
|
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*/
|
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static int nlm4_xdr_enc_testargs(struct rpc_rqst *req, __be32 *p,
|
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const struct nlm_args *args)
|
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{
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const struct nlm_lock *lock = &args->lock;
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struct xdr_stream xdr;
|
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|
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xdr_init_encode(&xdr, &req->rq_snd_buf, p);
|
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encode_cookie(&xdr, &args->cookie);
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encode_bool(&xdr, lock->fl.fl_type == F_WRLCK);
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encode_nlm4_lock(&xdr, lock);
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return 0;
|
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}
|
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|
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/*
|
||||
* struct nlm4_lockargs {
|
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* netobj cookie;
|
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* bool block;
|
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* bool exclusive;
|
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* struct nlm4_lock alock;
|
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* bool reclaim;
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* int state;
|
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* };
|
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*/
|
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static int nlm4_xdr_enc_lockargs(struct rpc_rqst *req, __be32 *p,
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const struct nlm_args *args)
|
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{
|
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const struct nlm_lock *lock = &args->lock;
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struct xdr_stream xdr;
|
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|
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xdr_init_encode(&xdr, &req->rq_snd_buf, p);
|
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encode_cookie(&xdr, &args->cookie);
|
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encode_bool(&xdr, args->block);
|
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encode_bool(&xdr, lock->fl.fl_type == F_WRLCK);
|
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encode_nlm4_lock(&xdr, lock);
|
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encode_bool(&xdr, args->reclaim);
|
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encode_int32(&xdr, args->state);
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return 0;
|
||||
}
|
||||
|
||||
/*
|
||||
* struct nlm4_cancargs {
|
||||
* netobj cookie;
|
||||
* bool block;
|
||||
* bool exclusive;
|
||||
* struct nlm4_lock alock;
|
||||
* };
|
||||
*/
|
||||
static int nlm4_xdr_enc_cancargs(struct rpc_rqst *req, __be32 *p,
|
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const struct nlm_args *args)
|
||||
{
|
||||
const struct nlm_lock *lock = &args->lock;
|
||||
struct xdr_stream xdr;
|
||||
|
||||
xdr_init_encode(&xdr, &req->rq_snd_buf, p);
|
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encode_cookie(&xdr, &args->cookie);
|
||||
encode_bool(&xdr, args->block);
|
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encode_bool(&xdr, lock->fl.fl_type == F_WRLCK);
|
||||
encode_nlm4_lock(&xdr, lock);
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||||
return 0;
|
||||
}
|
||||
|
||||
/*
|
||||
* struct nlm4_unlockargs {
|
||||
* netobj cookie;
|
||||
* struct nlm4_lock alock;
|
||||
* };
|
||||
*/
|
||||
static int nlm4_xdr_enc_unlockargs(struct rpc_rqst *req, __be32 *p,
|
||||
const struct nlm_args *args)
|
||||
{
|
||||
const struct nlm_lock *lock = &args->lock;
|
||||
struct xdr_stream xdr;
|
||||
|
||||
xdr_init_encode(&xdr, &req->rq_snd_buf, p);
|
||||
encode_cookie(&xdr, &args->cookie);
|
||||
encode_nlm4_lock(&xdr, lock);
|
||||
return 0;
|
||||
}
|
||||
|
||||
/*
|
||||
* struct nlm4_res {
|
||||
* netobj cookie;
|
||||
* nlm4_stat stat;
|
||||
* };
|
||||
*/
|
||||
static int nlm4_xdr_enc_res(struct rpc_rqst *req, __be32 *p,
|
||||
const struct nlm_res *result)
|
||||
{
|
||||
struct xdr_stream xdr;
|
||||
|
||||
xdr_init_encode(&xdr, &req->rq_snd_buf, p);
|
||||
encode_cookie(&xdr, &result->cookie);
|
||||
encode_nlm4_stat(&xdr, result->status);
|
||||
return 0;
|
||||
}
|
||||
|
||||
/*
|
||||
* union nlm4_testrply switch (nlm4_stats stat) {
|
||||
* case NLM4_DENIED:
|
||||
* struct nlm4_holder holder;
|
||||
* default:
|
||||
* void;
|
||||
* };
|
||||
*
|
||||
* struct nlm4_testres {
|
||||
* netobj cookie;
|
||||
* nlm4_testrply test_stat;
|
||||
* };
|
||||
*/
|
||||
static int nlm4_xdr_enc_testres(struct rpc_rqst *req, __be32 *p,
|
||||
const struct nlm_res *result)
|
||||
{
|
||||
struct xdr_stream xdr;
|
||||
|
||||
xdr_init_encode(&xdr, &req->rq_snd_buf, p);
|
||||
encode_cookie(&xdr, &result->cookie);
|
||||
encode_nlm4_stat(&xdr, result->status);
|
||||
if (result->status == nlm_lck_denied)
|
||||
encode_nlm4_holder(&xdr, result);
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
* NLMv4 XDR decode functions
|
||||
*
|
||||
* NLMv4 argument types are defined in Appendix II of RFC 1813:
|
||||
* "NFS Version 3 Protocol Specification" and Chapter 10 of X/Open's
|
||||
* "Protocols for Interworking: XNFS, Version 3W".
|
||||
*/
|
||||
|
||||
/*
|
||||
* union nlm4_testrply switch (nlm4_stats stat) {
|
||||
* case NLM4_DENIED:
|
||||
* struct nlm4_holder holder;
|
||||
* default:
|
||||
* void;
|
||||
* };
|
||||
*
|
||||
* struct nlm4_testres {
|
||||
* netobj cookie;
|
||||
* nlm4_testrply test_stat;
|
||||
* };
|
||||
*/
|
||||
static int decode_nlm4_testrply(struct xdr_stream *xdr,
|
||||
struct nlm_res *result)
|
||||
{
|
||||
int error;
|
||||
|
||||
error = decode_nlm4_stat(xdr, &result->status);
|
||||
if (unlikely(error))
|
||||
goto out;
|
||||
if (result->status == nlm_lck_denied)
|
||||
error = decode_nlm4_holder(xdr, result);
|
||||
out:
|
||||
return error;
|
||||
}
|
||||
|
||||
static int nlm4_xdr_dec_testres(struct rpc_rqst *req, __be32 *p,
|
||||
struct nlm_res *result)
|
||||
{
|
||||
struct xdr_stream xdr;
|
||||
int error;
|
||||
|
||||
xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
|
||||
error = decode_cookie(&xdr, &result->cookie);
|
||||
if (unlikely(error))
|
||||
goto out;
|
||||
error = decode_nlm4_testrply(&xdr, result);
|
||||
out:
|
||||
return error;
|
||||
}
|
||||
|
||||
/*
|
||||
* struct nlm4_res {
|
||||
* netobj cookie;
|
||||
* nlm4_stat stat;
|
||||
* };
|
||||
*/
|
||||
static int nlm4_xdr_dec_res(struct rpc_rqst *req, __be32 *p,
|
||||
struct nlm_res *result)
|
||||
{
|
||||
struct xdr_stream xdr;
|
||||
int error;
|
||||
|
||||
xdr_init_decode(&xdr, &req->rq_rcv_buf, p);
|
||||
error = decode_cookie(&xdr, &result->cookie);
|
||||
if (unlikely(error))
|
||||
goto out;
|
||||
error = decode_nlm4_stat(&xdr, &result->status);
|
||||
out:
|
||||
return error;
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
* For NLM, a void procedure really returns nothing
|
||||
*/
|
||||
#define nlm4_xdr_dec_norep NULL
|
||||
|
||||
#define PROC(proc, argtype, restype) \
|
||||
[NLMPROC_##proc] = { \
|
||||
.p_proc = NLMPROC_##proc, \
|
||||
.p_encode = (kxdrproc_t)nlm4_xdr_enc_##argtype, \
|
||||
.p_decode = (kxdrproc_t)nlm4_xdr_dec_##restype, \
|
||||
.p_arglen = NLM4_##argtype##_sz, \
|
||||
.p_replen = NLM4_##restype##_sz, \
|
||||
.p_statidx = NLMPROC_##proc, \
|
||||
.p_name = #proc, \
|
||||
}
|
||||
|
||||
static struct rpc_procinfo nlm4_procedures[] = {
|
||||
PROC(TEST, testargs, testres),
|
||||
PROC(LOCK, lockargs, res),
|
||||
PROC(CANCEL, cancargs, res),
|
||||
PROC(UNLOCK, unlockargs, res),
|
||||
PROC(GRANTED, testargs, res),
|
||||
PROC(TEST_MSG, testargs, norep),
|
||||
PROC(LOCK_MSG, lockargs, norep),
|
||||
PROC(CANCEL_MSG, cancargs, norep),
|
||||
PROC(UNLOCK_MSG, unlockargs, norep),
|
||||
PROC(GRANTED_MSG, testargs, norep),
|
||||
PROC(TEST_RES, testres, norep),
|
||||
PROC(LOCK_RES, res, norep),
|
||||
PROC(CANCEL_RES, res, norep),
|
||||
PROC(UNLOCK_RES, res, norep),
|
||||
PROC(GRANTED_RES, res, norep),
|
||||
};
|
||||
|
||||
struct rpc_version nlm_version4 = {
|
||||
.number = 4,
|
||||
.nrprocs = ARRAY_SIZE(nlm4_procedures),
|
||||
.procs = nlm4_procedures,
|
||||
};
|
||||
255
fs/lockd/xdr4.c
255
fs/lockd/xdr4.c
|
|
@ -93,15 +93,6 @@ nlm4_decode_fh(__be32 *p, struct nfs_fh *f)
|
|||
return p + XDR_QUADLEN(f->size);
|
||||
}
|
||||
|
||||
static __be32 *
|
||||
nlm4_encode_fh(__be32 *p, struct nfs_fh *f)
|
||||
{
|
||||
*p++ = htonl(f->size);
|
||||
if (f->size) p[XDR_QUADLEN(f->size)-1] = 0; /* don't leak anything */
|
||||
memcpy(p, f->data, f->size);
|
||||
return p + XDR_QUADLEN(f->size);
|
||||
}
|
||||
|
||||
/*
|
||||
* Encode and decode owner handle
|
||||
*/
|
||||
|
|
@ -111,12 +102,6 @@ nlm4_decode_oh(__be32 *p, struct xdr_netobj *oh)
|
|||
return xdr_decode_netobj(p, oh);
|
||||
}
|
||||
|
||||
static __be32 *
|
||||
nlm4_encode_oh(__be32 *p, struct xdr_netobj *oh)
|
||||
{
|
||||
return xdr_encode_netobj(p, oh);
|
||||
}
|
||||
|
||||
static __be32 *
|
||||
nlm4_decode_lock(__be32 *p, struct nlm_lock *lock)
|
||||
{
|
||||
|
|
@ -149,38 +134,6 @@ nlm4_decode_lock(__be32 *p, struct nlm_lock *lock)
|
|||
return p;
|
||||
}
|
||||
|
||||
/*
|
||||
* Encode a lock as part of an NLM call
|
||||
*/
|
||||
static __be32 *
|
||||
nlm4_encode_lock(__be32 *p, struct nlm_lock *lock)
|
||||
{
|
||||
struct file_lock *fl = &lock->fl;
|
||||
__s64 start, len;
|
||||
|
||||
if (!(p = xdr_encode_string(p, lock->caller))
|
||||
|| !(p = nlm4_encode_fh(p, &lock->fh))
|
||||
|| !(p = nlm4_encode_oh(p, &lock->oh)))
|
||||
return NULL;
|
||||
|
||||
if (fl->fl_start > NLM4_OFFSET_MAX
|
||||
|| (fl->fl_end > NLM4_OFFSET_MAX && fl->fl_end != OFFSET_MAX))
|
||||
return NULL;
|
||||
|
||||
*p++ = htonl(lock->svid);
|
||||
|
||||
start = loff_t_to_s64(fl->fl_start);
|
||||
if (fl->fl_end == OFFSET_MAX)
|
||||
len = 0;
|
||||
else
|
||||
len = loff_t_to_s64(fl->fl_end - fl->fl_start + 1);
|
||||
|
||||
p = xdr_encode_hyper(p, start);
|
||||
p = xdr_encode_hyper(p, len);
|
||||
|
||||
return p;
|
||||
}
|
||||
|
||||
/*
|
||||
* Encode result of a TEST/TEST_MSG call
|
||||
*/
|
||||
|
|
@ -379,211 +332,3 @@ nlm4svc_encode_void(struct svc_rqst *rqstp, __be32 *p, void *dummy)
|
|||
{
|
||||
return xdr_ressize_check(rqstp, p);
|
||||
}
|
||||
|
||||
/*
|
||||
* Now, the client side XDR functions
|
||||
*/
|
||||
#ifdef NLMCLNT_SUPPORT_SHARES
|
||||
static int
|
||||
nlm4clt_decode_void(struct rpc_rqst *req, __be32 *p, void *ptr)
|
||||
{
|
||||
return 0;
|
||||
}
|
||||
#endif
|
||||
|
||||
static int
|
||||
nlm4clt_encode_testargs(struct rpc_rqst *req, __be32 *p, nlm_args *argp)
|
||||
{
|
||||
struct nlm_lock *lock = &argp->lock;
|
||||
|
||||
if (!(p = nlm4_encode_cookie(p, &argp->cookie)))
|
||||
return -EIO;
|
||||
*p++ = (lock->fl.fl_type == F_WRLCK)? xdr_one : xdr_zero;
|
||||
if (!(p = nlm4_encode_lock(p, lock)))
|
||||
return -EIO;
|
||||
req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int
|
||||
nlm4clt_decode_testres(struct rpc_rqst *req, __be32 *p, struct nlm_res *resp)
|
||||
{
|
||||
if (!(p = nlm4_decode_cookie(p, &resp->cookie)))
|
||||
return -EIO;
|
||||
resp->status = *p++;
|
||||
if (resp->status == nlm_lck_denied) {
|
||||
struct file_lock *fl = &resp->lock.fl;
|
||||
u32 excl;
|
||||
__u64 start, len;
|
||||
__s64 end;
|
||||
|
||||
memset(&resp->lock, 0, sizeof(resp->lock));
|
||||
locks_init_lock(fl);
|
||||
excl = ntohl(*p++);
|
||||
resp->lock.svid = ntohl(*p++);
|
||||
fl->fl_pid = (pid_t)resp->lock.svid;
|
||||
if (!(p = nlm4_decode_oh(p, &resp->lock.oh)))
|
||||
return -EIO;
|
||||
|
||||
fl->fl_flags = FL_POSIX;
|
||||
fl->fl_type = excl? F_WRLCK : F_RDLCK;
|
||||
p = xdr_decode_hyper(p, &start);
|
||||
p = xdr_decode_hyper(p, &len);
|
||||
end = start + len - 1;
|
||||
|
||||
fl->fl_start = s64_to_loff_t(start);
|
||||
if (len == 0 || end < 0)
|
||||
fl->fl_end = OFFSET_MAX;
|
||||
else
|
||||
fl->fl_end = s64_to_loff_t(end);
|
||||
}
|
||||
return 0;
|
||||
}
|
||||
|
||||
|
||||
static int
|
||||
nlm4clt_encode_lockargs(struct rpc_rqst *req, __be32 *p, nlm_args *argp)
|
||||
{
|
||||
struct nlm_lock *lock = &argp->lock;
|
||||
|
||||
if (!(p = nlm4_encode_cookie(p, &argp->cookie)))
|
||||
return -EIO;
|
||||
*p++ = argp->block? xdr_one : xdr_zero;
|
||||
*p++ = (lock->fl.fl_type == F_WRLCK)? xdr_one : xdr_zero;
|
||||
if (!(p = nlm4_encode_lock(p, lock)))
|
||||
return -EIO;
|
||||
*p++ = argp->reclaim? xdr_one : xdr_zero;
|
||||
*p++ = htonl(argp->state);
|
||||
req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int
|
||||
nlm4clt_encode_cancargs(struct rpc_rqst *req, __be32 *p, nlm_args *argp)
|
||||
{
|
||||
struct nlm_lock *lock = &argp->lock;
|
||||
|
||||
if (!(p = nlm4_encode_cookie(p, &argp->cookie)))
|
||||
return -EIO;
|
||||
*p++ = argp->block? xdr_one : xdr_zero;
|
||||
*p++ = (lock->fl.fl_type == F_WRLCK)? xdr_one : xdr_zero;
|
||||
if (!(p = nlm4_encode_lock(p, lock)))
|
||||
return -EIO;
|
||||
req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int
|
||||
nlm4clt_encode_unlockargs(struct rpc_rqst *req, __be32 *p, nlm_args *argp)
|
||||
{
|
||||
struct nlm_lock *lock = &argp->lock;
|
||||
|
||||
if (!(p = nlm4_encode_cookie(p, &argp->cookie)))
|
||||
return -EIO;
|
||||
if (!(p = nlm4_encode_lock(p, lock)))
|
||||
return -EIO;
|
||||
req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int
|
||||
nlm4clt_encode_res(struct rpc_rqst *req, __be32 *p, struct nlm_res *resp)
|
||||
{
|
||||
if (!(p = nlm4_encode_cookie(p, &resp->cookie)))
|
||||
return -EIO;
|
||||
*p++ = resp->status;
|
||||
req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int
|
||||
nlm4clt_encode_testres(struct rpc_rqst *req, __be32 *p, struct nlm_res *resp)
|
||||
{
|
||||
if (!(p = nlm4_encode_testres(p, resp)))
|
||||
return -EIO;
|
||||
req->rq_slen = xdr_adjust_iovec(req->rq_svec, p);
|
||||
return 0;
|
||||
}
|
||||
|
||||
static int
|
||||
nlm4clt_decode_res(struct rpc_rqst *req, __be32 *p, struct nlm_res *resp)
|
||||
{
|
||||
if (!(p = nlm4_decode_cookie(p, &resp->cookie)))
|
||||
return -EIO;
|
||||
resp->status = *p++;
|
||||
return 0;
|
||||
}
|
||||
|
||||
#if (NLMCLNT_OHSIZE > XDR_MAX_NETOBJ)
|
||||
# error "NLM host name cannot be larger than XDR_MAX_NETOBJ!"
|
||||
#endif
|
||||
|
||||
#if (NLMCLNT_OHSIZE > NLM_MAXSTRLEN)
|
||||
# error "NLM host name cannot be larger than NLM's maximum string length!"
|
||||
#endif
|
||||
|
||||
/*
|
||||
* Buffer requirements for NLM
|
||||
*/
|
||||
#define NLM4_void_sz 0
|
||||
#define NLM4_cookie_sz 1+XDR_QUADLEN(NLM_MAXCOOKIELEN)
|
||||
#define NLM4_caller_sz 1+XDR_QUADLEN(NLMCLNT_OHSIZE)
|
||||
#define NLM4_owner_sz 1+XDR_QUADLEN(NLMCLNT_OHSIZE)
|
||||
#define NLM4_fhandle_sz 1+XDR_QUADLEN(NFS3_FHSIZE)
|
||||
#define NLM4_lock_sz 5+NLM4_caller_sz+NLM4_owner_sz+NLM4_fhandle_sz
|
||||
#define NLM4_holder_sz 6+NLM4_owner_sz
|
||||
|
||||
#define NLM4_testargs_sz NLM4_cookie_sz+1+NLM4_lock_sz
|
||||
#define NLM4_lockargs_sz NLM4_cookie_sz+4+NLM4_lock_sz
|
||||
#define NLM4_cancargs_sz NLM4_cookie_sz+2+NLM4_lock_sz
|
||||
#define NLM4_unlockargs_sz NLM4_cookie_sz+NLM4_lock_sz
|
||||
|
||||
#define NLM4_testres_sz NLM4_cookie_sz+1+NLM4_holder_sz
|
||||
#define NLM4_res_sz NLM4_cookie_sz+1
|
||||
#define NLM4_norep_sz 0
|
||||
|
||||
/*
|
||||
* For NLM, a void procedure really returns nothing
|
||||
*/
|
||||
#define nlm4clt_decode_norep NULL
|
||||
|
||||
#define PROC(proc, argtype, restype) \
|
||||
[NLMPROC_##proc] = { \
|
||||
.p_proc = NLMPROC_##proc, \
|
||||
.p_encode = (kxdrproc_t) nlm4clt_encode_##argtype, \
|
||||
.p_decode = (kxdrproc_t) nlm4clt_decode_##restype, \
|
||||
.p_arglen = NLM4_##argtype##_sz, \
|
||||
.p_replen = NLM4_##restype##_sz, \
|
||||
.p_statidx = NLMPROC_##proc, \
|
||||
.p_name = #proc, \
|
||||
}
|
||||
|
||||
static struct rpc_procinfo nlm4_procedures[] = {
|
||||
PROC(TEST, testargs, testres),
|
||||
PROC(LOCK, lockargs, res),
|
||||
PROC(CANCEL, cancargs, res),
|
||||
PROC(UNLOCK, unlockargs, res),
|
||||
PROC(GRANTED, testargs, res),
|
||||
PROC(TEST_MSG, testargs, norep),
|
||||
PROC(LOCK_MSG, lockargs, norep),
|
||||
PROC(CANCEL_MSG, cancargs, norep),
|
||||
PROC(UNLOCK_MSG, unlockargs, norep),
|
||||
PROC(GRANTED_MSG, testargs, norep),
|
||||
PROC(TEST_RES, testres, norep),
|
||||
PROC(LOCK_RES, res, norep),
|
||||
PROC(CANCEL_RES, res, norep),
|
||||
PROC(UNLOCK_RES, res, norep),
|
||||
PROC(GRANTED_RES, res, norep),
|
||||
#ifdef NLMCLNT_SUPPORT_SHARES
|
||||
PROC(SHARE, shareargs, shareres),
|
||||
PROC(UNSHARE, shareargs, shareres),
|
||||
PROC(NM_LOCK, lockargs, res),
|
||||
PROC(FREE_ALL, notify, void),
|
||||
#endif
|
||||
};
|
||||
|
||||
struct rpc_version nlm_version4 = {
|
||||
.number = 4,
|
||||
.nrprocs = 24,
|
||||
.procs = nlm4_procedures,
|
||||
};
|
||||
|
|
|
|||
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Reference in New Issue